Holy Crap!! The price of Paint.....

Ah the good ol' days. Single stage enamel held up great on real metal. It didn't need to be flexible or contain all those UV additives.
This is just FYI... Remember when the plastic filler between body and a shock bumper would rot away. The plastic hasn't gotten much more stable over the years. The UV protection that saves todays plastic bumper cover, etc., is in the paint.